[llvm] [AArch64] Add clmul/h/r v16i8/v8i16/v4i32/v2i64 test coverage (PR #182305)

[David Green via llvm-commits]

davemgreen wrote:

> I couldn't find any of the clmulr/h patterns (half of which crash)? And the v2i64 coverage seemed to be purposely designed to avoid the legalizer crash we're seeing.

Adding those variants does sound useful. Do you mind either incorporating the ones that are not already in there into the existing file? I believe we added some clmul(zext, zext) tests already too.

https://github.com/llvm/llvm-project/pull/182305